Spring-cushion.



Patented Sept. 30, |902. E.- DENEGRE. SPRING cusmo'n.v

(Application led May 22, 1902.|

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UNITED STATES PATENT OFFICE.

EDWARD DENEGRE,OF CHICAGO, ILLINOIS, 'ASSIGNOR TO MCCORD dr COM- PANY,OF CHICAGO, ILLINOIS, A CORPORATION OE NEW JERSEY.

SPRING-CUSHION.

SPECIFICATION forming part of Letters Patent No. 709,969, datedSeptember 30, 1902. Application filed May 22,1902. Serial No. 108,551.(No modell) To all whom/ it m/nty concern.-

Be it known that I, EDWARD DENEGRE, a citizen of the UnitedStates,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Spring-Cushions, (CaseNo. 2,) of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawings, formingIo a part of this specification.

My invention relates to spring-cushions employing coiled springs incombination with retarders or dampeners made of spring metal, wherebyfriction may be secured to reduce I5 the vibration of the coiled springsby the resiliency of the said spring metal.

One object of the invention is to provide a structure wherein acap-plate formed of resilient spring metal may be employed and zo meanswhereby the operation of such capplate may be positively limited, whichresult may be secured by providing a rigid friction element inassociation with the flexible capplate, whereby a greatadvantage issecured 2 5 over spring-cushions wherein both cap-plates are made ofresilient spring metal, neither of which furnishes an abutment orpositive limitation for the operation of the other. Such devices of theprior art have not met with 3o the satisfaction desired, owing to thefact that they have not given the requisite degree of flexibility inoperation and the required sufficiency of friction, especially where acluster or group of four springs is employed 3 5 arranged in aquadrilateral.

My invention has for its further object the provision of a structurewherein eective operation can be secured with any arrangement of thesprings,to which end each spring 4.o is provided with a completefriction-producing element in addition thereto, which element ispreferably inthe form of a cap-plate composed of resilient spring metal.The springs of a cluster are provided with rigid cap-plates in additionto the flexible capplates, the rigid cap-plates being preferablycompositely formed in oneintegral structure, such a structure in effectaffording a plurality of pockets corresponding to the recesses 5oafforded by ordinary cap-plates. In forming the rigid cap-plates websintersecting each other at right angles are provided with a topplatewhich is bent vertically at two parallel edges, which vertical portions,together with the webs, constitute pockets for receiving the coiledsprings. In this manner the coiled springs may be assembled very closelywhile at the same time constituting complete combinations of spring withretarding elements. The flexible cap-plates are preferably inclosed 6oby the rigid cap-plates, so that the range of operation of the flexiblecap-plates will be well defined and a structure more readilymanufactured secured. Y

I wllexplain my invent-ion more fully by reference to the accompanyingdrawings, in which Figure 1 is a bottom view on line 1 1 of Fig.

2. Fig. 2 is a vertical sectional view on line 2 2 of Fig. l. Fig. 3 isa perspective View of 7o a flexible cap-plate. Fig. 4 is a perspectiveview of a plurality of rigidcap-plates formed in one integral structure.

Like parts are indicated by similar characters of reference throughoutthe different figures.

The coiled springs a are designed to be interposed between the parts tobe cushioned, each coiled spring being surrounded by an individualcap-plate b, in this instance shown 8o asv the lower cap-plate, eachindividual capplate being formed of resilient spring metal, whereby theside anges c e thereof may in y the embodiment of the invention showntend to spread outwardly. There is also associated 8 5 with eachindividual cap-plate h a friction element, preferably rigid, whichelement preferably takes the form of a cap-plate,one for each coiledspring. The rigid cap-plates are preferably formed in an integral group,there be- 9o in g illustrated a plate portion d, designed for,engagement with one of the parts to be cushioned. Each plate portion dis downturned at its margins e e to form some of the vertical walls ofthe cap-plates,the balance of these vertical Walls being formed by websff, disposed at right angles with relation to each other and integrallyformed with the plate d. The lower cap-plates,initally possessingsomesuch shape as shown in Fig. 3, have their 1o.

side flanges compressed to be `inserted between the walls @and f of therigid cap-plates,

whereby these vertical walls of the flexible cap-plates are maintainedunder compression when inclosed by the rigid cap-plates, therebyconstantly securing friction, this friction serving to retard thevibration of the coiled springs. This device is thus a satisfactorysubstitute for elliptic springs, which have hitherto been employed forinterposition between the parts to be cushioned, wherein the componentleaves furnish between themselves that degree of friction necessary tosecure the results attained by my device and highly desirable,especially wh ere passengercars or freight-cars for conveying perishablegoods are concerned. By providing the flexible cap-plates withsubstantially rigid conlpanion friction elements a 1n uch greater degrecof friction, secured through the spring action of the flexiblecap-plate, may be had than that secured between two cap-plates inengagement, both formed of spring metal, in that the rigid frictionelement or cap-plate offers what may be termed a positive abutmeut,7limiting and preventing material movement of the vertical flanges of thespring cap-plate, which limitation in the operation of the device is notpresent where both capplates are made of spring metal.

The device of my invention is particularly adapted for use in supportingrailway-vehicles upon trucks, though the invention is not to be limitedto this employment.

In Fig. 2 I have indicated parts g and 7L, which are to be cushioned,there being interposed between these parts the coiled springs, the rigidcap-plates being indicated upon the upper part g, while the flexiblecap-plates are indicated upon the lower part 7L.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. Inaspring-cusl1ion,thecombination with a coiledspring interposed between the parts to be cushioned, of a frictionelement upon the exterior of the coiled spring formed of resilientspring metal and moving with one of the parts to be cushioned, and arigid friction element moving with the other part to be cushioned,substantially as described.

2. In a spring-cushion,the combination with a coiled spring interposedbetween the parts to be cushioned, of a friction element upon theexterior of the coiled spring formed of resilient spring metal andmoving with one of the parts to be cushioned, and a rigid frictionelement moving with the other part to be cushioned, the rst aforesaidfriction element being in the form of a cap-plate inclosing the coiledspring, substantially as described.

3. In aspring-cushion,thecombination with a coiled spring interposedbetween the parts to be cushioned, of a friction element upon theexterior of the coiled spring formed of resilient spring metal andmoving with one of the parts to be cushioned, and a rigidfrietionelement moving with the other part to be cushioned, the second aforesaidfriction element being in the form of a cap-plate inclosing the coiledspring, substantially as described.

4. In aspring-cushion,the combination with a coiled spring interposedbetween the parts to be cushioned, of a friction element upon theexterior ot' the coiled spring formed of resilient spring metal andmoving with one of the parts to be cushioned, and a rigid frictionelement moving with the other part to be cushioned, the first frictionelement being in the form of a flexible cap-plate, while the secondfriction element is in the form of a rigid cap-plate, substantially asdescribed.

5. In aspringcushion,the combination with a coiled spring interposedbetween the parts to be cushioned, of a friction element upon theexterior of the coiled spring formed of resilient spring metal andmoving with one of the parts to be cushioned, anda rigid frictionelement moving with the other part to be cushioned, the first frictionelement being in the form of a flexible cap-plate while the secondfriction element is in the form of arigid cap-plate, the rigid cap-plateinclosing the flexible cap-plate, substantially as described.

6. The combination with a plurality of coiled springs interposed betweenthe parts to be cushioned, of a plurality of flexible capplates movingwith one of the parts to be cushioned, structurally distinct from eachother and formed of spring metal to thereby secure friction, and aplurality of cap-plates formed in a single unitary structure with whichthe exible cap-plates have frictional engagement and having side Wallse, e and webs f, f affording pockets for receiving the coiled springs,substantially as described.

7. The combination with a plurality of coiled springs interposed betweenthe parts to be cushioned, of a plurality of flexible capplates movingwith one of the parts to be cushioned, structurally distinct from eachother and formed of spring metal to thereby secure friction, and aplurality of rigid capplates formed in a single unitary structure withwhich the aforesaid cap-plates have frictional engagement and havingside walls e, e and Webs f, faffording pockets for receiving the coiledsprings, substantially as described.

8. The combination with va, plurality of coiled springs interposedbetween the parts to be cushioned, of a plurality of flexible capplatesmoving with one of the parts to be cushioned, structurally distinct fromeach other and formed of spring metal to thereby secure friction, and aplurality of cap-plates formed in a single unitary structure with whichthe flexible cap-plates have frictional engagement, and having sidewalls e, e and websf, faffording pockets for receiving the coiledsprings, the first aforesaid cap-plates being inclosed by the secondaforesaid capplates, substantially as described.

9. The combination with a plurality of coiled springs interposed betweenthe parts to be cushioned, of a plurality of flexible cap- IOO IIO

plates moving with one of the parts to be plates being inclosed by thesecond aforesaid 1o cushioned, structurally distinct from eachcap-plates, substantially as described'.

other and formed of spring metal to thereby In witness whereof Ihereunto subscribe my secure friction, and a plurality of rigid capnaine this 19th day of May,'A. D. 1902.

plates formed in a single Yunitary structure With which the aforesaidcap-plates have fric- EDWARD DENEGRE tional engagement, and having sideWalls e, e Witnesses: and webs f, f aording pockets for receiving HARVEYL. HAN'soN,

the coiled springs, the first aforesaid cap- JOHN STAHR.

